Automatic train-stop.



Patented Jan. 1918.

A. Y. DODGE.

AUTONlAIC TRAIN STOP.

APPUcmoN min MN. 28. |914.

WIr/VESSES: fawwb Alma/m Iat UNITED STATES 'PATENT oiEIoE.`

ADIEL YEAHAN DODGE, OF CHICAGO, ILLINOIS.

AUTOMATIC TRAIN-STOP.

Application filed Januar'y 28, 1914. Serial 110,815,009;

To all 'whom t may concern:

Be it known that I, ADIEL YEAMAN DODGE, a citizen of the United States,residn at Chicago, in the county of Cook and State of Illinois, haveinvented new and useful Improvements in Automatic Train-Stops, of whichthe following is a "'ull, clear, concise, and exact description,reference being` had to the aecompanylng drawing, forming a part of thisspecifica' tion. l

My invention relates to improvements in automatic train stops.

Among the principal objects of my 11ivention are: A

First: To provide an automatic tram stop capable of causing the brakesto be applied gradually7 `andsuch that it may be used also in connectionWith throttle closinf apparatus. Vcecond: To provide such a stop that 1sself closing after the brakes have been set, independently of theengineer.

Third: To provide such a stop adapted for use with practically any cabsignaling.

system, but particularly adapted to the system set forth in myc0-pend1ng application Serial. No. 815,010 iledV'Jan. 28, 1914.

Fourth; To provide a stop such that it allows the train line-air toescape at a desired rate until a desired'pressure is reached and thenretains it, and such that during the time such air is escaping the mainreservoir air is conlined.

These and other-objects will be apparent from the following descriptionand the accompanying drawing, taken in connection with the appendedclaims. y

The drawing is a sectional elevation of an automatic stop constructed inaccordance with my invention.

Like reference characters refer to like parte throughout thefollowingdescription and the drawing. H

Referring to the drawing, the stop con siste of a double valvecomprising two sliding members working in opposition to cach other.-llach is impclled by the air it conlines. l' have shown these. valves1n the AForm of pistons 13, lli: housed in cylinders 5, 12 but they maybe of sorhe other shape. The cylinder 5 and the easing 2C' are in onepiece. )heap 1l` is provided with means to hold the eylindcr .l2directly opposite 5`cylind'er Pistons 13, 1,4 are connected Speeicationo! Letten Patent.

'show the half which remains.

vline 0f travel of the valve.

Patented Jan. 1. `191e.l

together by a connecting rod 6 and move as one. W1th1n the casin 10 aretwo' electro-magnets' which are yo ed together' and held in place -byany suitable means such as bolts and nuts. Magnets 15 hold armature 8againsttheir cores when energized. Ar-

-mature 8 isrigidly connected tothe lower part of a speclalcam 7 whichis also lo- -4 cated in casing 10 and pivoted in the same `at 9. Thisspecial cam is a combined lever and cam, nndis shaped to straddle theconnecting rod 6 and is slotted on both sides to operate on pivot 16 inconnecting rod 6. The lower portion of one side of the cam is shown cutand broken away, in order to The mechanical advantage of this cam isderived from two sources; first, from the lever ratio from thepoint 9 tothe point 16 and one illustrated in my copendmg applica tion, Serial No.768,058 filed-May 16, 1913. The heads of the cylinders are providedvwith threaded` ports 27, 28 which may be connected directly with thedesired pipe or with some intermediate member such as I have shown. Port2.7 in the Ahead of cylinder 5 is connected with the train line throughan adjustable needle valve 18.A The port in the head of cylinder 12 iaconnected to'a safety valve 21 ora reductionvalve as desired or n.combination 'of both connectie tlul cylinder 4with the main reservoir."Cy

'indcr 12 is also provided with a port 20 leading to the engineers valveand train line located to he Vopened and closed b l the piston' 14.Cylinder 5 Vis provided witliI ditiona-l ports 22 which are exhaustports. In order that the cylinder` 45 5 should be inaccessible throughtheexhaustpcrts they, arcmadc in the forni of by-Passes -whic conductthe'air'tothe-casing 10 and then loc iop

into the atmospherethrough ports23. If"

it is desired to utilize the exhaust air to close the throttle,pertsfeeare omittdmd 'a port 19 is prov1ded to'exhau'st. the vair' intothrottle closing' apparatus snch,,f0r example, as is shown in my co?el'idingfap plication, Serial'No. 768,058, lii ed 16,

In operation air #fromthe train line. is.

` admitted to cylinder through port 27 and fiends onthe ratio of needlevalve 18 which is open'accordng to its adjustment. The constant pressureon iston 13 tends to force it outwardly. Air rom the main 'reservoirenters safety valve 21 at 'port 25 and is admitted into cylinder 12through port 28. This constant ressure piston 14 in opposition to tends.to force resid-tant of these two. forces piston 13, The

13. The 'magnitudexof this resultant detlyo pistons13 and 14 Vand theratio ot' the tWO air pressures. Whihneton them., YIf u I' reduction`valve is used. in place of the safety ing piston 14 inward'.

the atmos During' this-t operation the cam strikes the 45 valve 21'thisresultant can be adjusted adjusting the reduction valve to control theair pressure admitted to cylinder 12. Whereas resultant force can onlybe regulated by the ratio of the piston. area.

7- bears against the pivot 16, the cam being in place by the engagementof the arthe' electromognets 15.

main reservoir enters ':ylinder 12V and is conducted to theengineersva'lve through lport 20. When .magnet ll5 becomes deenergizedarmature 8 and cam 7 are released and piston 13 moves outward fore Asthe head of piston-13 uncovers the ports 22 the air lbenj-ns to escape.from the train. valve 18, c linder 5ports 22 and 23,- intofilierethereby stopping the train.

ratchet lever'of the'counting device 17 and causes lit tol stop. l?iston14 now .covers port 2.0 shutting' "olf Vair 'between the reservoir andthe rest of theair brake equipment.

, Wil-mth@ nir in" the one 1in@J his reachedv the predetermined pressurethe, foregofpiston 14 over-balances the force of piston13 causing ititorecede until com- .'munication; is closedxbetween train .pipe 2 4 '55` v"I tuantfequilibriunr y 2t). isjcovered .prior to the uncoveringofportsf22in and ports 22. Theitwo pistons reaeh, .a.fl ue attlns point.The port order 'to prevent air from/ pass- 'lng-from' the' mam reservoirinto Itho. .train "Ehilth P'SOIIBZnre inl operation. In con. `piston Y13to return .v to `its 'tiollfthe engineer'mustfprther pmssurein'thetrain. line by hiel mkevnve, when-pistn i4- ;v'wglli-for piston 13 backand will rock cam the diameter of the without the reduction vvztlve theY "To hold the pisf. .ton 13 in normal confining position the comlinethrough needle.

register an operation Vof the tolnaticnlly releasable, so, arranged thatwhen released it will. be

i mais@ 7. so *flm'l'r'ofwill como in contact with- `en nego! netsa'reenergized t ture B and' cam'7 w again retain piston 13 in its normal'tion f It will benotedthat'the cam 7` is continuously in -contact withthe pivot 16, thus facilitating th'e automatic return of the cam toretaining position. It will be further f seen that I have provided astop simple in its nature, for inasmuchv as the pistons are connectedwith one. another and the 'cafm' and armature are connected,y there arebut two moving` parts.

It 'will be. apparent that numerous' changes may be made inthe form,arrangement and construction of the parts Without departing from thespirit ofthe invention ets 15. .If the magafl Will hold the armaorexceeding the scope of the appended I-Iavingthus described my invention.

what I claim as new and desire to :secure by Letters Potent, is: v

l. An automatic tra-in `top comprising-av member arranged to confine thetrain. vline n i r under-normal conditions, molly retaining said memberslxclnoniinl ing position.. said retaining means being :mtonmtirnllyrolensnble, said member being so :wronged that when released it will beimpvl'lod in one v lil'eetion by the force Fit' the means for norv trainlino air und back to normal position i b v the 'torrie ot' the mainreservoir nir. und moons for permitting said 'train line :iir to escupe'when said member is out of said nor# nml position, thereby to` stop thetrnin.-

2..- n :infomatie train stop comprising a mmnber arranged to'confinelthe train iin air under normal'conditions, means 'tornen mollyretaining said member in such contining' position, said retaining meansbeing" :uni

toniaticzilly .releasnblm arranged that when impelled in one direction'train line air. and' back to normal position by the force of the mainvreeervoir nir. :nul means for 'escape gra: rally when' said member isAour otsuid Anormal train. l

. 3. AAn `automatic tru-in stop comprising a said member beingreleasedzit. will be position, thereby to stop the by the force o'tthepermitting said train lino air -to l member 'arranged to confine'. the.train lino -i nir under normal conditions, .means for non mollyretaining snid member in such coolining posi tion, saidmtaining meansbeing :iu-

sn-id member boing lmpelled in one direction by the force ofthe trainline air and buck-to norm-ul position by 1 moin Arservoir nir, Mid

Bil

'tbe train .line

tomatically toeai v ing.` position; after the' -enig opened. I"

memberarranged, under normal conditlons, toooniinethe tramlineammr'ornorf pelled bylrtli'e foroeof the main reservoir. air

to return said first `named lnemberto normal position, v f ,y 1

5. An automatiogtrain 'stop comprising''al member' arranged, undernormal conditions, to. confino the train lineair, means for normallyretaining said vmember in snob ,com filling; position, said retainingmeans being automaticall rales-sable, means' for allowing said tram lineair to escape thereby to stop llietl'ain when said member isreicaSed,and a member associated YW-il'Jb said first nan'reclmembern andarranged-ton-eoniine .the main reservoir air wl'riie said train line airis being permitted to escape as aforesaid,

3. An automatic train stop oomprisingn member arranged, under normalconditions, to confine tbe train line air,"means for ndrmally retainingsaid member in such confining position, said retaining means-beingautomatically releasable, an adjustable port :for allowing said trainiine air to escape thereby to stoptbe train when said member isreleased, and a member associated. with said first named member and.arranged to confine the main reservoir air while said train line air isbeingV permitted to escape as aforesaid. 1

7. An automatic train stop comprising a double, valive, onrortion of'which is arranged to confine eftran line air under l normali conditiineens for normally re :taining Vsaid valve iin snob position, saidmeans being antlloniaticaily releasable, and

means for causing said valve to move when released into snolrgposition,that said train line iir is permitted, to escape, Lthe other 'por ,in*of'sai'ly'alse being arranged to con fino the main reservoir airvwheigaid valve is in saiiftlrtst named position'.

S. .Air automatic train stop comprising 'ociproeating member arranged,under normai conditions, toooniinoibe train line air'Y when in oneposition and to Aconfine tbe resl eawwoirair when in anothenposition,means for"nornmily retaining said member in said' n lt-nain rl position,means forv releasing s, ,gggyi' retaining member, thereby; to fallowsaid, 'member to more into a position to permitf the escape of said,train line air, and means "for returning saidmember to normal lposi- 4.aiitomatio train stopweompris'ii'ig a ,mined extent.

ald ,retaining meansbeing continus yin oontactwith 'snidmellnbenconditions-toponimo the tram* line air ne position and to oonnef'tbe rother noemen', means: for normally retammg said;y member :in vsaidiii-st named position, electromagnetic means rfor rel'asing saidretainingmember, thereby 75 torallo'w said member tofr'nove intoaosition to permitthe r ,sn1,'i})rsfajfsairltrain4 ine air, and moansyfori retlirning said member to normal position, saidgre,taining 1 meansbeing coi'tinnoiisly' in v(mntaot with vsaid member. 80

,I loilAn automaticvtrain stop compris-ingo reoipnoeatmgmemberarranged,vunder normal conditions, to confine 4the. train l.line airWbe'n'fin oelpositionf aridto confine thereaervoir air.whenin,4anotlierf`-pos'ition, acam ar# 85 rangedto normally retain saidVmeirlber `in said. first named pbsitioii, means for releas ing saidvcam, thereby tot allow said member to move into a position to permittheescape ofsaid train4 line air, and means forl return'- 90 ing` 'saidmembert'o normal position, said @am being. continnouslyiil ,Contact withrsaid fmernbern lil. .An atomatic train stop comprising a reciprocatingmemberV arranged, under nornia-l conditions, to coninethetrain'line air4when in one position and ,to confine the reservoir air when-in another'position, a cam arranged. to normally retain said member in said firstnamed positioin, electromagnetic means for releasing said Miam, thereb.low saidimember tojmove into a posltion to permit the esoapef'ofsaidftrain line air,and means for returning said member to normalposition, said cam being continuously in contact with said member.lQFThe combination with an automatic train stop for railroad signalingsystems, arf ranged to apply the brakesgradually and to connethercservoir vair during such operation, of means Yfor releasing thebrakes by first openingtbeengincers vvalve to furo therreduoetheairipressureto a predeter' An automatic train stop comprisinga11 5 pressnrrchalnben in communication with theI train line`, ,apressure-actuated member actu ated' by the' pressure in said chamber,meansj Wlierebyactuationof said member` releases.

theair in' said tram pipe, a'second ressur'f'w'lZO v chamber 1ncommnnl-eation'witht e reser-'f Y,

Voir, a second presso12e-actuatedinembel:l o any y tuated by thepresent-erin :said second chameseoond pressurenctuatc'd member confines125` tbe air inthetrain pipe. i o

14. lAn auton'latio train stop oomprisinga pressure-chamber inconnnunicationwith the train line, @pressure-actuatedmember -actn- Vber, and means `vvhereby the actuation 4of Said ated'bytbe pressure insaid cha ber, means 19.0V 4 i 'fines the air inA whereby actu the air insaid chamber in voir, a secon tuated by th' ber, and n said second pvand'returns said first` press tuatedmember.'

15. An autom ti pressure-chambe train line, a 'pre' connu'uncationwiththe resactuutd l'membenactuf ated by bamberg: means whereby actuationof: sarflmen'lber'releases the air iu said'trainfpipe,."\secondpressure- 'chamber in -conununication ywith the reser- .train stop(mila)'rising a v voir, a second' pressure-:actuated member actuuted bythev )ressurejin said Second-chamber, means W erebyxtheactuation*of saidsecond pressure-actuated member confines the air in the tramkpipeandrreturns said Y train line, a

first pressure-actuatedf member, and auto'- matically-controlled vmeansfor normally holding said pressureactuated 1f f mbersin position toconmpinew'tlre train' pi Y-air.

16. An automatic train comprising a "e cylinderincommunication with4 thepiston insaid cylinder actuated lb y they-pressure therein, meanswhereby acscribed my name in "tuation of said piston releases the air insaid 'trein pipe, 1 communicatlon'with the reservoir, el second a.second pressure cylinder in piston actuated by the'pressure insaidrsecond'cylind'e'r, andmeans whereby the actuation of said secondpiston confines the'. air in the trainpipe. 1'

17. An automatic train stop comprising a pressure-chamber incommunication with the train line, a pressurenctuated member' ac tuatedby the pressure in said chamber a second pressure chamber incommunication With the reservoir, a ated member actuated by the pressurein' said second chamber,A and means whereby actuation of said `firstpressure-actuated member releases the air in said train pipe, andWhereby actuation of said second.' pressure-actuated member confines theair Vin the train pipe and returns said' first pressure-actuated member.

In Witness whereof, I have hereunto sub- Athe presence of two Witnesses.

`H. `MoNRoE HMASON, E. R: KING.

second pressure-actu-

